Page loading errors

What to do

• Check whether you use Klaviyo Klaviyo App, Email Sending, Email Sending, Text Message Sending and 1 more. Check your stack

  Paste a package.json, lockfile, Terraform or a list of domains at down.guide/stack to see every provider you depend on.

• Confirm your retries, queues and scheduled jobs caught up after the 1h 27m it lasted.

  Anything that failed between 2026-05-19 16:11 UTC and 2026-05-19 17:38 UTC may need a replay.

• Subscribe to Klaviyo's feed to hear about the next one first. RSS feed

  https://down.guide/feed?provider=klaviyo works in Slack (/feed subscribe), Discord feed bots and any RSS reader.

Updates from Klaviyo 4

1. investigatingMay 19, 2026, 4:11 PM UTC

   Customers may be experiencing intermittent errors and slow page loads in the Klaviyo app. Our engineering team is actively investigating. We'll provide updates as soon as more information is available.

   provider

2. identifiedMay 19, 2026, 4:46 PM UTC

   We have identified the cause of the intermittent errors and slow page loads some customers are experiencing in the Klaviyo app. Some customers may also be experiencing delays of up to 20 minutes for email and SMS sends, as well as delays in flows that send push notifications. Our engineering team is deploying a fix.

   provider

3. monitoringMay 19, 2026, 5:17 PM UTC

   A fix has been deployed and system performance is improving. Intermittent errors, slow page loads, and delays for email and SMS sends are recovering. We continue to monitor closely.

   provider

4. resolvedMay 19, 2026, 5:38 PM UTC

   The intermittent errors, slow page loads, and delays for email and SMS sends have been resolved. A small number of push notifications from impacted flows are being replayed and will deliver shortly. This incident has been resolved.

   provider

Corrections

None so far.

Something wrong on this page? Report an error or send us a note. Every fix is listed here.